He attended the public schools, Cathedral School, De Louisiana Salle Institute, and Manhattan College.
Boylan was employed as a postal clerk and afterward engaged in the real estate business. He was elected as a Democrat to the 68th, 69th, 70th, 71st, 72nd, 73rd, 74th and 75th United States Congresses, holding office from March 4, 1923 until his death on October 5, 1938, in New York City. Boylan died on October 5, 1938, in French Hospital in Manhattan.
And was buried at the Calvary Cemetery in Queens.
He was a member of the New York State Assembly (New York Company, 11th Doctorate) in 1910, 1911 and 1912. He was a member of the New York State Senate from 1913 to 1922, sitting in the 136th, 137th, 138th, 139th, 140th, 141st, 142nd, 143rd, 144th and 145th New York State Legislatures.